The Discerning Shoppers Choice For The. Best Designers at a Discounted Price with. LANVIN Black Cotton Sweatpants Pants. Size 50 European = Size 34 U. LANVIN Black Cotton Sweatpants Pants Size 50/34 Waist 31 $745" is in sale since Thursday, June 09, 2016.This item is in the category "Clothing, Shoes & Accessories\Men's Clothing\Pants". The seller is "nymilan" and is located in Brooklyn, New York. This item can be shipped worldwide.